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Progress In Electromagnetics Research
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A WIDEBAND TWIN-DIAMOND-SHAPED CIRCULARLY POLARIZED PATCH ANTENNA WITH GAP-COUPLED FEED

By X. Li, X. Ren, Y.-Z. Yin, L. Chen, and Z. Wang

Full Article PDF (1,242 KB)

Abstract:
A novel twin-diamond-shaped antenna is presented for wideband circularly polarized (CP) radiation. By introducing a twin-diamond-shaped patch and a gap-coupled feed structure, a left-handed circularly polarized (LHCP) antenna in bore-sight direction is obtained. The gap-coupled feed structure consists of a horizontal microstrip arm of approximately 0.285λ0 at the centre frequency and two small diamonds, which greatly contributes to wideband characteristics. The experimental bandwidths of 10-dB return loss and 3-dB axial ratio (AR) for the antenna prototype are about 20% and 9.2%, respectively. The measured gain is more than 6.8 dBi over the entire bandwidth.

Citation:
X. Li, X. Ren, Y.-Z. Yin, L. Chen, and Z. Wang, "A Wideband Twin-Diamond-Shaped Circularly Polarized Patch Antenna with Gap-Coupled Feed," Progress In Electromagnetics Research, Vol. 139, 15-24, 2013.
doi:10.2528/PIER13030301
http://www.jpier.org/PIER/pier.php?paper=13030301

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